Filtering medium



W.'WIGKERSHAM.

FILTER.

/ Patented Jul y 15, 1856.

UNITED STATES PATENT onrucn.

WILLIAM WIOKERSHAM, OF BOSTON, MASSACHUSETTS.

FILTERING MEDIUM.

Specification of Letters Patent No. 15,363, dated July 15, 1856.

To all whom it may concern:

Be it known that I, WILLIAM WIOKER- SHAM, of Boston, in the county of Suffolk, in the State of Massachusetts, have invented a new and useful Water-Filter; and I do hereby declare that the following is a full and exact description thereof, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon, the same letters designating the same part in different figures, in which Figure 1 is a perspective view of said water-filter. Fig. 2 is a longitudinal section of the same showing each part. Fig. 3 is a support to the disk through which the filtering is performed. Fig. 4 is the filtering disk through which water and other fluids are passed to separate them from impurities. Fig. 5 shows a part of the filtering disk on an enlarged scale, exhibiting the apertures through said disk formed by the milling or engraving of one side of the thin strip of metal of which it is made. Fig. 6 is an enlarged view of the milled side of the metallic strip before it is coiled into a disk, while Fig. 5 shows the edge of the same after the coil is commenced.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation.

A, Fig. 2 represents a section of the upper part (B,) and also a screw (6 b) in the upper part to attach it to a faucet.

B is the lower part showing the aperture (0 0) through which the water passes out after being filtered, also the screw (d d) to attach it to the upper part.

O is a section of the support of the filter disk, the top view of which is seen in Fig. 3.

D is the filter disk, which I usually construct in the following manner: I take wire of any suitable metal, roll it to the requisite width and thickness, usually one tenth (1/10) of an inch wide, and about one one hundred and twentieth (1/120) of an inch in thickness. After annealing the strips of metal thus prepared, I run them between two rolls, one of which is finely milled or engraved in such a manner as to press into one side of said strips, small transverse grooves (m m m Figs. 5 and 6) extending from one edge to the other. These transverse grooves (m m m) in said strips of metal when coiled into a disk (D) form apertures for the water to pass through the said disk as will be seen by inspecting aportion of the disk at Fig. 5 and the formation of the grooves on an enlarged scale at Fig. 6. If the metal when thus prepared for said disk is of a corrodible nature, it is coated over with silver or other metal not liable to corrosion to prevent corrosion while in use; then it is closely wound into a spiral disk of the requisite size and the end of the strips fastened by soldering or otherwise, Four, or such number of holes as may be deemed necessary, are drilled from the edge to the center or nearly so of said disk, and wires driven into said holes and fastened by screw or otherwise to prevent any part from slipping out of its place by falling or other rough usage, as seen in section at D Fig. 4. When all parts are finished, the support (C) and filter disk (D) are placed into the lower part (B) as shown in the section Fig. 2. The upper part (A) is screwed into the lower in such a manner that the lower extremity (n n) comes close onto the disk, when it is ready for use.

The apertures (m m m) are of uniform size from one side of the disk to the other, and on that account animalculae or sediment which will not pass entirely through will rest on the upper side of the disk and can be readily removed by turning the disk the other side up and allowing the water to run through the other way giving it an important advantage, as in all other filters which I have seen, such objects are liable to become entangled below the surface of the filter so that they cannot be removed. The apertures (m m m) may be made of any degree of fineness, for any purpose simply by engraving the milling rolls sufliciently fine.

What I claim as my invention and desire to secure by Letters Patent, is

1. The use of a disk in water filters,

formed of flattened wire or narrow strips of 2. The method of making the filter disk With the spiral filter-disk all substantially as less liable to injury and more firm by insertherein described.

in pins from the ed e to or nearl t0 the cei iter through the di erent layers 0 metal- WILLIAM WIOKERSHAM' 5 lic strips of which it is made to hold them Witnesses to signature 1 in their places; this method of fastening the CHAS. W. SWETT, disk together I claim nnlv in combination A. L. FERNALD. 

